Blowtorch



April 24, 1928.

B. MARTIN BLOWTORCH Filed 00%.. 22, 1926 Patented Apr. 24, 1928.

UNITED STATES PATIENT OFFICE.

Bmmo MARTIN, for snenvnwymronrenn. d

, nnow'ronen. I

Application fi1ed-0ctober22, 1926.; Serial No. 143,360.

i back to the" tank.

It has for still another object to provide 'rn'eans' whereby thegasoline is prevented from going back. into the pump in case the valvedoes not work properly, by taking 2 away the pressure on the inside ofthe tank pressure tube.

These and other objects of the invention will hereinafter appear and thenovel features thereof will be specifically defined by the appendedclaims; a

The invention, lnits preferred form, is

e'lea'rly illustrated in the accompanying drawings, which, withthenumerals of reterence marked thereon, form a part of this specification,and In which Figure I is a side elevation of a .blovv 1 torch Hconstructed in accordance with my present invention. a 7

Figure 2 is a substantially central vertic'al section through the same,with parts shown in elevation, and portions broken away. 7 V i Likenumerals of reference indicate like parts in the different views.

Referring to the drawings:

The parts indicated in dotted lines in Fig ure 1 form no part of thepresent invention and as they may he of any well knowntype, or suchother as may perform the desired functions, and are well understbod,being herein shown merely for the purpose of showing the application ofthe present intion of said parts as shown in dotted linesui s necessary,further than to merely state that 1 indicates the tank, 2 the torch, 3the neutral valve therefor, 4 the pipe sup a5- portihg thefltoreh andthe eup 5, as usual,

Theeasting'h .ven-tio-n, which resides in the 'striieture I shown inenlarged section in]? igure 2' and 5 as applied in Figure 1, nodetailedfdeseripit bein g understood that the piped commun'lcateswiththe interior'of the tank. a The present invention, as 'hereinbeforestated, resides in' the novel construction and arrangement of parts asshownin full lines in Figure .1 and in detail in" Figure 2,: to

which latter attention isnow directed, and

in which 6 is a member, a'casting. preferably, 3 comprising a lateral:member 7 having. at

one a threaded portion 8 adapted to be serewedinto the wall of the tank,.thisinember' 'Zhav'ing. passage 9 therethrough as seenin FigureQ, theother end: of said member havingthe upright terminalilO comma. nieatin-gwith-the passage or bore 91nd being threaded as seen at 11 for thereception of the lower threaded end 12 of the pump barrel, as shown inFigure};

The pump may be of welt known or approved form adapted to the purpose,14

being the piston.15 its red, and 16 a packing 111130 or washer for theusual purpose, 17 being aspring around the piston rodand bearing uponthe upper face of the piston 14.

. The piston or the pump is provided with the usual ringi'orotheriprovision 18 by which the]. piston is reeiprocated, 19 being thecap 13013116 pump barrel." I p 20 is an" uprightmember rising from thelateral member? of themeniber 6 and having the bore :orpassa-ge 21 theupper end a of which communicates with the upper lateral passage} 22,which, in turn, communieatesvvith the vertical bore 0r'pa'ssa ge 23 inthevertical portion 24 of the casting 6, as shown clearly Figure 2.

Communication between the passage-s22 and 23 in the: easting is'controlledby the air valve 25 disposed within "the depending -member 26 ofthe'easti'ng 6 and adapted to be actuated by means of the handle 2701iits stem 28;

The upper end otthe pump barrel is s'us tained lin'p'osition by beingreceived within thering or the like 29 on the lateral arm 30 of thecasting 6. p a has further the lateral arm or nipple 31- in which isscrewed one end of the lateral pipe 32, the'other endoi which is screwedinto the tank Inear' the upper end of the latter. I c p The upper endofth'e' casting 1 terminates in the filling cup 33, the"- stem 34 orthis eup being internally threaded as seen iii Figure 2 within thisthreaded here is screwed the advantages.

lower threaded end of the valve rod 35, the latter being tubular andcarrying the valve 36 having a washer 37, the valve rod having a handle38 which valve rod passes loosely through a convex cap 39 seated withinthe filling cup, and the outer cap 40 resting .upon the upper edge ofthe filling cup and having its lower edge extended below said edge.

On top of the cap 40 is shown a washer or plate 41 against which bearsthe spring 42 surrounding the rod 35. The valve rod 35 hasralateralopening or openings 43, see Figure 2, to allow of the return to the tankof'any vapor that may accumulate in the passage filling cup, through thesaid passage 43.

The parts just described in detail having been connected up with thetank in the manner shown their purpose is asfollows:

The caps 39 and 40 are held closed by the spring so securely the escapeof vapors is prevented and this provides a safeguard against explosionswhich are apt to occur when the gasoline vapors are allowed to escape.

WVhen ready to use the torch the air valve 25 is opened and a fewstrokes of the pump givenand then the valve closed. .This takes away thepressure on the interior of the tank pressure tube; which is a veryimportant factor for thereby the gasoline is kept from going back intothe pump, in case the valve does notwork properly.

Upon referenceto Figure 2 there will be seen some holes43 in the screwthreaded portion of the rod 35. By loosening the screw on the fillingcup slightly, say, about a quarter of an inclnjust suficient to allow ofthe escape of the vapor into the filling cup .and thence back into thetank. As soon as this is. done the flame will be extinguished 'quickly,and nothing else has to be done until itis desired to use the torchagain.

lVhile the essential features of the present invention are as aboveoutlined, it is evident that the means of accomplishing the ends in viewmay be modified without departing from the invention or sacrificing anyof its I therefore do not wish to restrict myself to the particularconstruction, arrangement, and shape of the parts, but reserve the rightto make such changes, vari ations and modifications as come properlywithin the scope of the appended claims.

For instance, as seen in Figure 1 I sometimes may provide anadditionalcup50 10- eated on the pipe 4:which connects the tank with theburner. This, it will be noticed, is located just under the drip pan andreceives that gasoline that overflows from the said drip pan,therebygiving a quicker heating generator and stronger heating power to theburner, and also lessens the smoking.

What is claimed as new is;

1. In a blow torch, a filling cup, a closure therefor, a supplemental.closure, cooperating therewith, a valve rod passed through saidclosures, and a spring on the rod acting upon the outermost closure.

2. In a blow torch, a filling cup, a closure fitted therein, a closurefitting over the top of said cup, a valve controlling the outflow fromthe said cup, the rod for said valve, and spring acting on the outermostclosure to safeguard against escapeof vapors and hence explosions.

3. A blow torch attachment comprising acasting having threaded extensionfor connection with a tank and an upright terminal for connection with apump, an upright tubular member rising from the extension andterminating in a lateral passage and vertical bore and a chamberconnected therewith, and a stem and filling cup at the upper end of saidcasting and a lateral member for cooperation with a pump barrel.

4;. In a blow torch, the combination with the filling cup thereof, ofmultiple closures therefor, one of which is within the other, and theoutermost one bearing on the upper edge of the cup and means for puttingsaid closures under compression to effectually pre vent the escape ofgasoline vapor.

5. In a blow torch, the-combination with the filling cup thereof, ofmultiple closures therefor, one of which is within the other, and theoutermost one bearing on the upper edge of thecup means for putting saidelosures under compression to effectually pre-' 6. In a blow torch, thecombination with the filling tube thereof, of multiple closurestl'ierefor, one of which is within theother, and the outermost onebearing on the upper edge of the cup means for putting said closuresunder compressioin-to effectually prevent escape of gasoline vapor, anda valve cooperable with the compression means, the stem of the saidvalve being provided with an opening to provide communication betweenthe cup and the tank when the valve is raised.

7. In a blow torch, a member having a lateral pipe for connection with atank, and a filling cup, a closure for the filling cup, a valvecontrolling the outlet from the fillin cup and having a rod passedthrough saiclosure, and supplemental closure means within thesaidclosure and within the cup and through which the valve rod looselypasses. I

8. In a blow torch, a member having a lateral pipe for connection with.a tank, and a filling cup, a closure for the filling cup, a valvecontrolling the outlet from the filling cup, the said valve having a rodprojecting into the outlet and provided with openings to allow thereturn of vapor to the tank, and supplemental Closure means Within theclosure and'within the cup and through which the valve rod looselypasses.

9. In a blow torch, a member having a lateral pipe for connection'with atank, and

a'filling cup, a closure for the filling cup, I a valve controlling theoutlet from the filling H It'l cup and having a rod passed throu h thesaid closure, a supplemental Closure or the filling cup and throughwhich said valve rod passes, an air pump supported from said membenandan air valve'in the connection between the pump and the said member;

In testimony whereof I affix my signature.

I BRUNO MARTIN.

